There was a time in which no word struck such fear into the heart of a mariner than the name of the kraken. Said to be an island-sized monster with a penchant for sinking ships, it terrorized sailors in northern Europe. Thought to be an entire mile long, it was known to be a vicious creature that fed on the flesh of unfortunate sailors. It was so large that even if it decided in a rare moment of mercy to spare you, as it departed the waves it created would often destroy your ship anyway.
In pop culture the kraken is generally depicted as a massive cephalopod-esque creature, occasionally with some artistic liberties added such as spikes on the tentacles. This is actually a fairly accurate representation of what the kraken was thought to be in Scandinavian myth, which is where the foundations for the modern legend were laid. Despite this, there have been other cultures that have a monster similar to the kraken. For example, the ancient Greeks told of two horrors that each inhabited once side of the Strait of Messina, Scylla and Charybdis. Scylla was said to be a massive creature with numerous heads, all waiting to snap up the sailors forced her way by Charybdis.
While at first glance she does not bear many similarities to the kraken, it is possible to see how both myths may have originated from the same creature. If you replace the gaping mouths of Scylla with thrashing tentacles the two creatures would be near indistinguishable. However, the kraken as we would recognize it today was first mentioned in a 13th-century Scandinavian saga which depicted two sea monsters, the Hafgufa and the Lyngbakr. The Hafgufa is thought to be the same as the kraken.
There is an obvious culprit for the myth of the kraken: the giant squid. While it perhaps does not reach quite the same size as the kraken was purported to, the fact is that we know very little about giant squid. They are extremely difficult to come across, but our best estimates peg them at 15-18m long and around 300kg. And there is even more evidence to support that they inspired the myth of the kraken. The Scandinavian saga mentioned above about the two sea monsters depicts one, Hafgufa, similar to a massively proportioned squid. But the other creature, Lyngbakr, is very similar to a whale. In the saga these creatures are locked in a battle. Here’s why that’s interesting; it is a known habit of whales, specifically sperm whales, to hunt giant squid. Adult sperm whales often have scars from where the tentacles of the squid ripped off their skin. While it is unlikely that the giant squid often wins, it is possible that the squid is able to drown the whale although little evidence of this has been found. In any case, it seems interesting that the Scandinavians knew that these creatures were connected.
So does the kraken exist? I doubt that the mile-long leviathan described in mythology is real, but I will say this. For all our reliance on the oceans of Earth, we have barely explored 20 percent of them. While the kraken itself may not exist, we have no idea what could live in the dark depths of the sea. One day we might find something that makes even the legendary kraken look ordinary.